CN115761124A - Head type three-dimensional modeling method - Google Patents
Head type three-dimensional modeling method Download PDFInfo
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- CN115761124A CN115761124A CN202211418862.7A CN202211418862A CN115761124A CN 115761124 A CN115761124 A CN 115761124A CN 202211418862 A CN202211418862 A CN 202211418862A CN 115761124 A CN115761124 A CN 115761124A
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- 210000004209 hair Anatomy 0.000 claims abstract description 35
- 210000003128 head Anatomy 0.000 claims description 69
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- 210000004761 scalp Anatomy 0.000 claims description 4
- 230000003803 hair density Effects 0.000 claims description 3
- 208000014674 injury Diseases 0.000 claims description 3
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- 238000000638 solvent extraction Methods 0.000 claims description 3
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- 239000013013 elastic material Substances 0.000 description 5
- 238000004364 calculation method Methods 0.000 description 3
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- 210000004709 eyebrow Anatomy 0.000 description 2
- 210000000887 face Anatomy 0.000 description 2
- 230000001815 facial effect Effects 0.000 description 2
- 208000032544 Cicatrix Diseases 0.000 description 1
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- 238000011161 development Methods 0.000 description 1
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Abstract
The invention discloses a head three-dimensional modeling method, which can quickly perform quick three-dimensional modeling on conventional head clients, can continuously expand database information to gradually cover most of people, can quickly perform quick three-dimensional modeling on the conventional head clients, and can continuously expand the database information to gradually cover most of people. According to the head three-dimensional modeling method, the head three-dimensional model is quickly established by classifying different face shapes, acquiring the three-dimensional coordinates of a plurality of key points and then fitting each point into a face, the requirements of different modeling precision can be met by adjusting the number of the acquired key points, and the method is simple, and does not need to adopt hair sleeve/head sleeve, scanning, splicing and other processing.
Description
[ technical field ] A method for producing a semiconductor device
The invention belongs to the technical field of hairstyle design, and particularly relates to a head three-dimensional modeling method.
[ background of the invention ]
Hair styling is a comprehensive art which involves a variety of factors, such as the human head, face, sense organs, stature, age, etc., as well as the individual's occupation, complexion, dressing, personal taste, season, hair quality, applicability, and age. In addition, the design of the hairstyle of the human body is also influenced by the head state of the human body, and different head states have great difference on the appearance of the same hairstyle; therefore, in designing a hair style, a combination of factors is needed. With the continuous improvement of living standard of people, the requirements of people on hairstyles are higher and higher, the hairstyles are not only limited to the simple living needs in the past, but also have higher requirements on the hairstyles, and different personalities and different aesthetic standards are required to be reflected, so that the aim of improving personal quality, image and charm is fulfilled.
At present, the presentation of the hair style is often realized by means of a hairdresser or a hairdresser, and the presentation of the hair style by each hairdresser or hairdresser is influenced by the technical skill and the working state of the hairdresser or the hairdresser, so that certain differences are often generated in the process of presenting the same hair style for multiple times, and particularly, the differences are particularly obvious when the same hair style is applied to different head styles, which inevitably reduces the accuracy of hair style reuse. Although some hair style design software exists in the prior art, people can be helped to realize on-line design of a hair style, for example, uploading an image or taking a picture on the internet, performing a series of hair style designs, and allowing a designer to print out or write down a serial number of the hair style, and then, the designer can refer to the design after arriving at a barbershop. However, most of hairstyle design software in the prior art applies a designed hairstyle model, and often lacks support of data such as individual head shape, scalp and hair, or individual data is not comprehensive, fine and specific, so that such hairstyle design can only be regarded as one hairstyle wearing, the designed hairstyle model is worn on the head just like a hat, and lacks reality, and the hairstyle and the individual head shape often cannot be fully attached, and the human head shape is different, so that the effect of matching the hairstyle often differs greatly from the actual situation. Moreover, the distribution, number, thickness, luster, softness, elasticity and other data of the hair on each individual head are different, and a designed hairstyle model according to one individual is difficult to be completely reproduced on the head of another individual. Therefore, when an individual designs and selects a hairstyle through the current hairstyle design software, it is often difficult to accurately determine whether data such as his own head shape and hair meets the conditions of the hairstyle model, determine whether the individual can trim the hairstyle on his head, and ensure that the effect between the trimmed hairstyle and the designed hairstyle is consistent.
With the great development of computer graphics and image processing technology, the three-dimensional face modeling technology in the cross field of two subjects is widely applied to the related industries such as game animation, medicine and face-lifting, video advertisements, video conferences and video phones, and gradually becomes a hot problem of research. The current major techniques for three-dimensional face modeling include the following:
1. three-dimensional face modeling based on a three-dimensional scanner and the like: the method mainly comprises the steps of scanning a human face by using a three-dimensional digital scanner to obtain three-dimensional information of the human face, and carrying out three-dimensional reconstruction on a human face model in a computer according to the obtained three-dimensional data. However, the method for performing three-dimensional face modeling by using hardware devices such as a three-dimensional scanner has poor universality and flexibility, is complex to operate, has high cost of the hardware devices, and is generally only suitable for some special occasions.
2. The face modeling method based on the image comprises the following steps: the method mainly comprises the steps of obtaining three-dimensional information of human face characteristic points through single-viewpoint or multi-viewpoint human face images or video sequences, and reconstructing a three-dimensional geometric model of a human face by utilizing the information. The face modeling method based on the image is mainly divided into modeling based on a single face image and modeling based on a plurality of face images.
3. Modeling based on a single face image: the basic method is to judge the depth information on a face model through a micro-side face image or light and shade information on the image, so as to complete the modeling work of the three-dimensional face. However, the method of modeling with a single face image requires a trade-off between the shape and appearance of the face, and it is difficult to accurately fit a model that matches a real face. Because the left side and the right side of the face are not completely symmetrical, when the face at the micro side is used for collecting depth information, the distortion of the face appearance after reconstruction is caused; when depth information is calculated by using shadow and highlight of the front image of the face, a good effect is often difficult to obtain due to the defects of complex calculation, long calculation time, poor reliability of a calculation result and the like.
4. Modeling based on multiple face images: the method is characterized in that three-dimensional data of more human faces are obtained through a plurality of multi-angle human face images, such as front, left side, right side and the like, so as to carry out three-dimensional modeling on the human faces. The modeling based on the multiple face images can more intuitively and completely obtain the front texture information, the depth information and the like of the face, thereby being beneficial to establishing a more accurate three-dimensional face model. However, the method for modeling by using a plurality of face images can obtain the information of the face such as the front texture, the face depth and the like, but increases the steps of manual operation to a certain extent and reduces the flexibility of operation. In some handheld devices, it is difficult for a user to conveniently provide a side image meeting requirements, which also has a great influence on the accuracy of face modeling.
At present, measurement and three-dimensional modeling of a head form are generally realized through three-dimensional scanning, and the head form modeling is influenced by hairs during the three-dimensional scanning, so that the head form can be slowly scanned only after being wrapped by an elastic material, and a model obtained through scanning is stored in a computer.
[ summary of the invention ]
Aiming at the problems that the head shape is required to be wrapped by elastic materials before the head shape is scanned slowly and the scanned model is stored in a computer in the prior three-dimensional scanning process, but the modeling method has the defects of complex flow, low speed and inaccuracy, the invention provides the head shape three-dimensional modeling method which can rapidly carry out rapid three-dimensional modeling on conventional head shape clients and can continuously expand database information to cover most people step by step.
The purpose of the invention is realized by the following technical scheme:
a head type three-dimensional modeling method comprises the following steps:
1) Firstly classifying different face types, collecting head types of different face types according to the classification, collecting a plurality of data samples, storing the data samples in a computer system, wherein the head types of the samples are required to have no trauma and no scar, the hair is natural black, and the collected data samples comprise:
a. taking pictures or recording images of the head form from the front, the side and the top according to the posture of the head form in a standing state, recording the pictures or the image forms of the face form and the head form, and using the pictures or the image forms as a sample database for later comparison;
b. in the fixed state of the step a, collecting and recording three-dimensional coordinates of a plurality of sensitive points in an area above the neck, and storing the three-dimensional coordinates as a sample database in a computer for later comparison after recording;
c. in the fixed state of the step a, continuously scanning and collecting the hair of the person to be collected in the state of shaving all the hair and only keeping the root of the hair, counting the hair density on the basis of distinguishing the root of the hair on the scalp, and obtaining and storing accurate head data;
d. dividing the surface of the collected head-shaped three-dimensional model into a plurality of areas, wherein each area is mainly rectangular to avoid triangles, and the intersection points of the areas take the sensitive points in the step b as nodes during partitioning;
e. on the basis of the step d, subdividing each area of the surface of the collected head-shaped three-dimensional model into a plurality of flaky grids, fitting flaky points by using curves, and storing fitting curves and parameters thereof;
2) And e, performing head three-dimensional modeling on the client on the basis of the database established in the step e:
f. b, taking side, front and top images of the client in the fixed state of the step a, comparing the side, front and top images with the image of the data, selecting the face closest to or with the smallest difference, and locking the data under the face;
g. b, collecting and recording sensitive point coordinates of the client according to the fixed state of the step a, comparing the sensitive point coordinate data with the face data locked in the step f, and fitting the head three-dimensional data of the client by using a curve similar to fitting if the sensitive point coordinate data is within an error range; and if the head shape is not in the error range, early warning is carried out, the head shape is collected and stored in the database locked in the step f, and the database is expanded.
In the invention:
the different face shapes in the step 1) comprise oval, square, rectangular, round and the like.
The three-dimensional coordinates of the plurality of sensitive points in the step b comprise a lowest point 1 of the chin, a highest point 2 of the vertex of the head, a central point 3 between the eyebrows, a most salient point 4 of the back of the head, the lowest points 5 of the drips on two sides, and the uppermost points 6 of the hairline arc of the auricle, 8230and the like.
Compared with the prior art, the invention has the following advantages:
1. the head-form three-dimensional modeling method can not only rapidly carry out rapid three-dimensional modeling on conventional head-form customers, but also continuously expand database information to gradually cover the vast majority of people.
2. According to the head three-dimensional modeling method, the three-dimensional coordinates of a plurality of key points are acquired by classifying different face shapes, then the head three-dimensional model is quickly established in a way that each point is fitted into a face, the requirements of different modeling precision can be met by adjusting the number of the acquired key points, the method is simple, and processes such as hair sleeve/head sleeve scanning and splicing are not needed.
[ description of the drawings ]
FIG. 1 is a diagram of different facial shapes according to an embodiment of the present invention;
FIG. 2 is a diagram of collecting and recording three-dimensional coordinates of a plurality of sensitive points in an area above the neck according to an embodiment of the present invention;
FIG. 3 is a view showing a head model covered with an elastic material and then slowly scanned in a comparative example;
fig. 4 is a diagram of a model obtained by scanning in a comparative example stored in a computer.
[ detailed description ] A
The following examples are provided to further illustrate the embodiments of the present invention.
The embodiment is as follows:
a head type three-dimensional modeling method comprises the following steps:
1) Firstly, classifying different face shapes, such as an ellipse, a square, a rectangle, a circle and the like, collecting head shapes of different face shapes and collecting a plurality of data samples according to the classification, storing the data samples in a computer system, wherein the head shapes of the samples require no trauma or scars, the hair is natural black, and the collected data samples comprise:
a. taking pictures or recording images of the head form from the front, the side and the top according to the posture of the head form in a standing state, recording the pictures or the image forms of the face form and the head form, and using the pictures or the image forms as a sample database for later comparison;
b. in the fixed state of the step a, three-dimensional coordinates of a plurality of sensitive points, namely a lowest point 1 of a chin, a highest point 2 of a vertex, a central point 3 between eyebrows, a most convex point 4 of a back head, a lowest point 5 of drips on two sides, and a highest point 6 of a hairline arc line of an auricle are collected and recorded in an area above a neck, wherein the three-dimensional coordinates are used for later comparison;
c. in the fixed state of the step a, continuously scanning and collecting the hair of the person to be collected in the state of shaving all the hair and only keeping the root of the hair, counting the hair density on the basis of distinguishing the root of the hair on the scalp, and obtaining and storing accurate head data;
d. dividing the surface of the collected head-shaped three-dimensional model into a plurality of areas, wherein each area is mainly rectangular, so that a triangle is avoided, and in the process of partitioning, the intersection point of each area takes the sensitive point in the step b as a node;
e. on the basis of the step d, subdividing each area of the surface of the collected head-shaped three-dimensional model into a plurality of flaky grids, fitting each flaky point by using a curve, and storing the fitted curve and the parameters thereof;
2) And e, performing head three-dimensional modeling on the client on the basis of the database built in the step e:
f. b, shooting images of the side, the front and the top of the client in the fixed state of the step a, comparing the images with the images of the data, selecting the face with the closest or smallest difference, and locking the data under the face;
g. b, collecting and recording sensitive point coordinates of the client according to the fixed state of the step a, comparing the sensitive point coordinate data with the face data locked in the step f, and fitting the head three-dimensional data of the client by using a curve similar to fitting if the sensitive point coordinate data is within an error range; and if the head shape is not in the error range, early warning is carried out, the head shape is collected and stored in the database locked in the step f, and the database is expanded.
FIG. 1 is a diagram of different facial shapes;
fig. 2 is a diagram of the acquisition and recording of three-dimensional coordinates of several sensitive points in the above-neck region.
Comparative example:
in the prior art, the head model can only be slowly scanned after being wrapped by elastic materials, and the model obtained by scanning is stored in a computer.
FIG. 3 is a view showing that the head is wrapped with an elastic material and then slowly scanned;
fig. 4 is a diagram in which a model obtained by scanning is stored in a computer.
Results and discussion:
in the existing method for carrying out three-dimensional modeling on the whole head shape, a scanning method is generally adopted, and only a three-dimensional model without hairs on the face can be established due to the influence of the hairs; or the head can be scanned in three dimensions by wearing a head cover/finishing head, the process is complicated, and the whole curved surface is scanned and spliced.
According to the method, the head three-dimensional model is quickly established by classifying different face types, acquiring the three-dimensional coordinates of the key points and then fitting the key points into a face, the requirements of different modeling precision can be met by adjusting the number of the acquired key points, and the method is simple, does not need to adopt hair sleeves/head sleeves and scanning, and does not need to carry out processing such as splicing.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the inventive concept of the present invention, which falls into the protection scope of the present invention.
Claims (3)
1. A head-form three-dimensional modeling method is characterized in that: the method comprises the following steps:
1) Firstly classifying different face types, collecting head types of different face types according to the classification, collecting a plurality of data samples, storing the data samples in a computer system, wherein the head types of the samples are required to have no trauma and no scar, the hair is natural black, and the collected data samples comprise:
a. respectively taking pictures or recording images of the head form from the front, the side and the top according to the posture of the head form in a standing state, recording the pictures or image forms of the face form and the head form, and using the pictures or image forms as a sample database for later comparison;
b. in the fixed state of the step a, collecting and recording three-dimensional coordinates of a plurality of sensitive points in an area above the neck, and storing the three-dimensional coordinates as a sample database in a computer for later comparison after recording;
c. in the fixed state of the step a, continuously scanning and collecting the hair of the person to be collected in the state of shaving all the hair and only keeping the root of the hair, counting the hair density on the basis of distinguishing the root of the hair on the scalp, and obtaining and storing accurate head data;
d. dividing the surface of the collected head-shaped three-dimensional model into a plurality of areas, wherein each area is mainly rectangular, so that a triangle is avoided, and in the process of partitioning, the intersection point of each area takes the sensitive point in the step b as a node;
e. on the basis of the step d, subdividing each area of the surface of the collected head-shaped three-dimensional model into a plurality of flaky grids, fitting flaky points by using curves, and storing fitting curves and parameters thereof;
2) And e, performing head three-dimensional modeling on the client on the basis of the database established in the step e:
f. b, shooting images of the side, the front and the top of the client in the fixed state of the step a, comparing the images with the images of the data, selecting the face with the closest or smallest difference, and locking the data under the face;
g. c, collecting and recording the sensitive point coordinates of the customer in the fixed state of the step a by referring the customer, comparing the sensitive point coordinate data with the face shape data locked in the step f, and fitting the head shape three-dimensional data of the customer by using a curve similar to fitting if the sensitive point coordinate data is within an error range; and if the head shape is not in the error range, early warning is carried out, the head shape is collected and stored in the database locked in the step f, and the database is expanded.
2. The method for three-dimensional modeling of a head form according to claim 1, wherein: the different face shapes in the step 1) comprise an oval shape, a square shape, a rectangular shape and a round shape.
3. The method for three-dimensional modeling of a head form according to claim 1, wherein: the three-dimensional coordinates of the plurality of sensitive points in the step b comprise a chin lowest point 1, a top highest point 2, an inter-eyebrow central point 3, a hindbrain spoon most salient point 4, two side dripping lowest points 5 and an auricle hairline most upper point 6.
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| CN202211418862.7A CN115761124A (en) | 2022-11-14 | 2022-11-14 | Head type three-dimensional modeling method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117389676A (en) * | 2023-12-13 | 2024-01-12 | 成都白泽智汇科技有限公司 | Intelligent hairstyle adaptive display method based on display interface |
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- 2022-11-14 CN CN202211418862.7A patent/CN115761124A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117389676A (en) * | 2023-12-13 | 2024-01-12 | 成都白泽智汇科技有限公司 | Intelligent hairstyle adaptive display method based on display interface |
| CN117389676B (en) * | 2023-12-13 | 2024-02-13 | 成都白泽智汇科技有限公司 | Intelligent hairstyle adaptive display method based on display interface |
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Application publication date: 20230307 |